# N178AC: 1971 Sikorsky S-64F

- Status: Valid registration
- Airframe: [Sikorsky S-64F](https://openairdocs.org/model/sikorsky-s-64f) (registry code 8142610, 3 seats)
- Engine: [Pratt & Whitney JFTD12A-5A](https://openairdocs.org/engine/pratt-whitney-jftd12a-5a) (registry code 51504)
- Data sheets: [TCDS H6EA](https://openairdocs.org/tcds/H6EA) (Erickson Incorporated DBA Erickson Air-Crane), [TCDS E15EA](https://openairdocs.org/tcds/E15EA) (Erickson Incorporated DBA Erickson Air-Crane) (OpenAirDocs)
- Serial number: 64097
- Year built: 1971
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, transport
- Airworthiness date: May 12, 2022
- Certificate issued: December 5, 2023
- Expires: December 31, 2030
- Mode S code: A136E8
- Registered owner: [Helicopter Express LLC](https://openairdocs.org/faa-owner/HELICOPTER%20EXPRESS%20LLC)
- Location: [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee)
- Owner type: LLC
- Owner's area on the map: 33.8885° N, 84.2895° W: Placed by OpenAirDocs at the center of ZIP code 30341, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=178AC
- Page: https://openairdocs.org/aircraft/N178AC

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 9 in force

### Matched by airframe (Sikorsky S-64F)

- [AD 2023-11-07](https://openairdocs.org/ad/2023-11-07): Ground Proximity System · Airbus Helicopters 47, 206, 210 and 237 more. Effective Jun 22, 2023
- [AD 2013-23-07](https://openairdocs.org/ad/2013-23-07): Main Rotor Blades · Erickson Air-Crane S-64E and S-64F. Effective Dec 27, 2013
- [AD 2012-26-06](https://openairdocs.org/ad/2012-26-06): Main Rotor Drive System and Tail Rotor System · Erickson Air-Crane S-64F. Effective Apr 16, 2013
- [AD 2012-23-11](https://openairdocs.org/ad/2012-23-11): Rotorcraft Tail Boom · Erickson Air-Crane S-64F. Effective Jan 14, 2013
- [AD 2011-21-12](https://openairdocs.org/ad/2011-21-12): Rotating swashplate assembly · Erickson Air-Crane S-64F. Effective Dec 1, 2011
- [AD 76-06-01](https://openairdocs.org/ad/76-06-01): Hydraulic Pumps · Erickson Air-Crane S-64A, S-64E, S-64F and 12 more. Effective Mar 24, 1976
- [AD 75-11-11](https://openairdocs.org/ad/75-11-11): Gear Box Shaft and Gear Assy · Erickson Air-Crane S-64E and S-64F. Effective Dec 2, 1975

### Matched by engine (Pratt & Whitney JFTD12A-5A)

- [AD 97-02-13](https://openairdocs.org/ad/97-02-13): Disk rupture · Pratt & Whitney Division JFTD12A-4A (T73P-1) and JFTD12A-5A (T73-P-700). Effective Apr 4, 1997
- [AD 71-24-05](https://openairdocs.org/ad/71-24-05): Compressor Rotor Discs · Pratt & Whitney Division JFTD12A-4A (T73P-1), JFTD12A-5A (T73-P-700), JT12A-6 and 2 more. Effective May 31, 1974

### Historical (superseded or no longer in force)

- [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more. Effective Dec 9, 2021
- [AD 97-10-15](https://openairdocs.org/ad/97-10-15) (historical): Main Gearbox Second Stage Lower Planetary Plate · Erickson Air-Crane S-64F. Effective Jun 27, 1997
- [AD 77-20-01](https://openairdocs.org/ad/77-20-01) (historical): Main Transmission Lower Planetary Plates · Erickson Air-Crane S-64E and S-64F

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N178AC.

## FAA accident and incident reports

None matched to N178AC.

## Service difficulty reports (11)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR MDR03032](https://openairdocs.org/sdr/MDR03032), Oct 2, 2004: BLEED VALVE. OBSTRUCTED. NR 1 ENG OIL PRESS WAS INDICATING LOWER THAN NR 2 ENG. PRESS INDICATED 45 PSI. ADJUSTED PRESS VALVE TO INCREASE CHECK AT NEXT FLT. NR 1 ENG WAS STARTED, INDICAT
- [SDR MDR03030](https://openairdocs.org/sdr/MDR03030), Sep 24, 2003: PLATE. CRACKED. DURING THE MAGNETIC PARTICLE INSPECTION OF THE 2ND STAGE PLANETARY PLATE, A CRACK WAS DETECTED. THE CRACK IS LOCATED IN THE .125 INCH R. FROM THERE, IT TRAVELS 
- [SDR 98ZZZX1743](https://openairdocs.org/sdr/98ZZZX1743), Apr 15, 1998: CENTER HOUSING. CRACKED. TAIL ROTOR GEARBOX WAS REMOVED FROM AIRCRAFT DUE TO A CRACK IN THE TAIL GEARBOX CENTER HOUSING WEB ADJACENT TO THE LOWER LEFT GEARBOX ATTACHMENT LUG. ENGINEERIN
- [SDR 98ZZZX68](https://openairdocs.org/sdr/98ZZZX68), Dec 9, 1997: CASE. CRACKED. WHILE INSTALLED, AFT FLANGE OF CASE SN 225 FRACTURED 360 DEGREES WITHIN THE FLANGE WELD JOINT. FRACTURING OF AFT FLANGE ASSY ELIMINATED THE AFT MOUNT FROM ENG S
- [SDR 97ZZZX2479](https://openairdocs.org/sdr/97ZZZX2479), Feb 1, 1997: MAIN SHAFT. CRACKED. MGB MAIN SHAFT INSPECTION, EIGHT SPLINES FOUND DURING MPI INSPECTION WITH ONE TO THREE INDICATIONS PER SPLINE. INDICATIONS WERE FOUND IN RADIUS AND TRAVELED UP 
- [SDR 96ZZZX5188](https://openairdocs.org/sdr/96ZZZX5188), Jul 26, 1996: BLADE BOLT. FRACTURED. CLIMB, 50-60 KTS IAS ABOUT 1K FPM RATE , PILOT NOTED VIBRATION IN T/R. RETURNED ORIG TAKEOFF POINT, LANDED. VIBRATION BECAME STRONGER DURING DESCENT. FOUND 8 BO
- [SDR 96ZZZX5189](https://openairdocs.org/sdr/96ZZZX5189), Jul 23, 1996: BLADE BOLT. FRACTURED. TWO BOLTS WERE FOUND FRACTURED ON THE YELLOW T/R BLADE AT THE PITCH CHANGE ATTACH LOCATION WHEN THE T/R WAS INSPECTED AT THE NOON SHUT-DOWN. THIS IS A GENERAL I
- [SDR 96ZZZX5190](https://openairdocs.org/sdr/96ZZZX5190), Jun 25, 1996: TABLOCK. MISSING. TABLOCK FOUND MISSING AT POST-FLIGHT INSPECTION ON 6-25-96. THE LAST OVERHAUL WAS PERFORMED BY SABRELINER. WHEN INSPECTING THE COMPRESSOR THROUGH THE INLET, CON
- [SDR 96ZZZX5191](https://openairdocs.org/sdr/96ZZZX5191), Apr 26, 1996: TABLOCK. MISSING. TABLOCK FOUND MISSING AT PRE-FLIGHT INSPECTION CONDUCTED ON 4-26-96. THE LAST OVERHAUL PERFORMED BY EAC ON 8-4-94. WHEN INSPECTING THE COMPRESSOR THROUGH THE IN
- [SDR 96ZZZX5192](https://openairdocs.org/sdr/96ZZZX5192), Dec 2, 1995: TABLOCK. MISSING. ENGINE FAILED INTERNALLY AT FIRST LIFT-OFF OF THE DAY. TABLOCK FOUND MISSING 12-2-95. THE LAST OVERHAUL PERFORMED BY EAC ON 1-6-94. WHEN INSPECTING COMPRESSOR T
- [SDR 96ZZZX5193](https://openairdocs.org/sdr/96ZZZX5193), Aug 22, 1995: TABLOCK. MISSING. ENGINE REMOVED FOR HSI. TABLOCK FOUND MISSING AT HIDDEN DAMAGE INSPECTION CONDUCTED ON COMPRESSOR BEING INDUCTED IN REPAIR STATION ON 8-22-95. THE LAST OVERHAUL

## STCs that may be installed (OpenAirDocs) (31)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Sikorsky S-64F)

- [STC SR11923SE](https://openairdocs.org/stc/SR11923SE): Installation of Helicopter Transport Services, LLC Shock Absorber HTS-2000. Helicopter Transport Services LLC
- [STC SR11810SE](https://openairdocs.org/stc/SR11810SE): Installation of Helicopter Transport Services, LLC External Load Indicating System. Helicopter Transport Services LLC
- [STC SR04343CH](https://openairdocs.org/stc/SR04343CH): Installation of Heli-Preheat Kit, p/n TA3193-1 for 115 volt application in accordance with Heli-Preheat Kit drawing TA3193-1 Revision D, dated December 11, 2023 or later FAA approved revisions and Preheat Kit Installation Instruction TNH3193 Revision B, dated July 6, 2018 or later FAA approved revisions. HARTZELL PROPELLER LLC
- [STC SH3319NM](https://openairdocs.org/stc/SH3319NM): Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,. Precise Flight Inc
- [STC SR02766SE](https://openairdocs.org/stc/SR02766SE): Installation of a Supplemental Lighting System. Aviation Specialties Unlimited Inc
- [STC SR02717SE](https://openairdocs.org/stc/SR02717SE): Installation of Helicopter Transport Services Remote Fuel Sump System. Helicopter Transport Services LLC
- [STC SR02684SE](https://openairdocs.org/stc/SR02684SE): Installation of Helicopter Transport Services, LLC (HTS) lightweight firefighting refill pump. Helicopter Transport Services LLC
- [STC SR00925DE](https://openairdocs.org/stc/SR00925DE): Installation of Garmin GTX 335/335R and GTX345/345R transponders to provide ADS-B Out and In functionality. Peregrine
- [STC SR00004SE](https://openairdocs.org/stc/SR00004SE): Fabrication and installation of Erickson fire fighting system. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SR00815SE](https://openairdocs.org/stc/SR00815SE): Fabrication and installation of Erickson Model Sea Snorkel system. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SR09574RC](https://openairdocs.org/stc/SR09574RC): Installation of Night Vision Goggle Compatible Lighting System. Aero Dynamix Inc
- [STC SR02055SE](https://openairdocs.org/stc/SR02055SE): Replacement tail rotor blades, Part Numbers 65161-00001-041MII and/or 65161-00001-043MII. Helicopter Transport Services LLC
- [STC SH5653NM](https://openairdocs.org/stc/SH5653NM): Re-mounting of the turbine engines and reinforcement of the associated fuselage support structure with Erickson detuned engine mounting system (DEMS). Erickson Incorporaated/dba Erickson Air-Crane
- [STC SR09415RC](https://openairdocs.org/stc/SR09415RC): Installation of Engine Monitoring System and Fuel Indication with multifunction displays (MFD-5200). Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SH5764NM](https://openairdocs.org/stc/SH5764NM): Increase in maximum ground idle speed. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SR00026SE](https://openairdocs.org/stc/SR00026SE): Fabrication and Installation of Erickson external load dynamic shock absorber system. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SR01955NY-D](https://openairdocs.org/stc/SR01955NY-D): Installation of a Keystone Helicopter Anit-Rotational Restraint System. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SR01611NY-D](https://openairdocs.org/stc/SR01611NY-D): Installation of a Keystone Helicopter cargo pod. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SR09411RC](https://openairdocs.org/stc/SR09411RC): Installation of Environmental Control System. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SR09412RC](https://openairdocs.org/stc/SR09412RC): Installation of Flight Display System. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SR09413RC](https://openairdocs.org/stc/SR09413RC): Installation of Automatic Flight Control System. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SR09414RC](https://openairdocs.org/stc/SR09414RC): Installation of Caution Advisory Panel. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SR09416RC](https://openairdocs.org/stc/SR09416RC): Installation of Avionics System. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SH5974NM](https://openairdocs.org/stc/SH5974NM): Replacement of existing combustion type cockpit heater with an engine bleed air type heater system. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SH1618NM](https://openairdocs.org/stc/SH1618NM): Installation of externally mounted ferry tanks. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SH3853NM](https://openairdocs.org/stc/SH3853NM): Modification of the Rotorcraft flight Manual. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SH5724NM](https://openairdocs.org/stc/SH5724NM): Use of Mobil Oil Corporation Mobilith SHC220 synthetic grease to lubricate selected components in place of the previously approved grease. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SH581NW](https://openairdocs.org/stc/SH581NW): Installation of a hydraulic hand pump on the rotor brake system. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SR00502SE](https://openairdocs.org/stc/SR00502SE): Fabrication and installation of Erickson Model 10333-101 (S-64E) or 10333-103 (S-64F) Water/Foam Cannon system. Erickson Air Crane Inc. dba Erickson Air-Crane
- [STC SH546NW](https://openairdocs.org/stc/SH546NW): Installation of an electronic weighting system (for monitoring cargo and/or hoist hook weight). Measurement Systems Intl
- [STC SH607NW](https://openairdocs.org/stc/SH607NW): Installation of mechanical release system for external cargo hook. McCallister Engineering Enterprises

## Related

- Other Sikorsky S-64F aircraft: https://openairdocs.org/model/sikorsky-s-64f/aircraft.md
- The Pratt & Whitney JFTD12A-5A engine: https://openairdocs.org/engine/pratt-whitney-jftd12a-5a.md

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